A novel terbium (III) and aptamer-based probe for label-free detection of three fluoroquinolones in honey and water samples

被引:37
作者
Chen, Jin'ai [1 ,2 ]
Jin, Yuting [1 ,2 ]
Ren, Taotao [1 ,2 ]
Wang, Shuo [1 ,3 ]
Wang, Xianghong [1 ]
Zhang, Fuyuan [1 ]
Tang, Yiwei [1 ]
机构
[1] Hebei Agr Univ, Coll Food Sci & Technol, Baoding 071001, Peoples R China
[2] Bohai Univ, Coll Food Sci & Project Engn, Jinzhou 121013, Peoples R China
[3] Nankai Univ, Sch Med, Tianjin Key Lab Food Sci & Hlth, Tianjin 300071, Peoples R China
基金
国家重点研发计划;
关键词
Terbium (III); Aptamer; Coordination polymer probe; Fluorescence sensing; Enrofloxacin; Norfloxacin; Ciprofloxacin; Food sample; DNA-SENSITIZED LUMINESCENCE; FLUORESCENCE DETECTION; ENERGY-TRANSFER; ANTIBIOTICS; CIPROFLOXACIN; COMPLEX; ENROFLOXACIN; ENHANCEMENT; RESIDUES; HYBRID;
D O I
10.1016/j.foodchem.2022.132751
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Fluoroquinolones, a family of synthetic broad-spectrum antibiotics, are widely used in clinical medicine, farm animals and aquaculture. Residues of fluoroquinolones in samples have attracted much attention because of growing food safety and public health concerns. Here, a novel Tb3+ ion-enrofloxacin aptamer coordination probe was prepared to develop a sensitive and rapid label-free fluorescence assay for specific detection three fluoroquinolones. In presence of the target, Tb3+ ion- enrofloxacin aptamer probe specifically bound with enrofloxacin, norfloxacin and ciprofloxacin, leading to a sharp increase in fluorescence emission of the probe. Under the optimized conditions, fluorescence increased linearly in the 1.0-100.0 ng/mL range for the three fluoroquinolones, with 0.053 ng/mL limit of detection for ciprofloxacin, 0.020 ng/mL limit of detection for norfloxacin and 0.061 ng/mL limit of detection for enrofloxacin. Satisfactory recovery (80.10-102.48%) in spiked honey and water samples were obtained for the three fluoroquinolones with relative standard deviations between 0.21% and 5.44% (n = 3).
引用
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页数:7
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